code: def test_tf_miss_environment_variables(sagemaker_session):
      tf = _build_tf(
          sagemaker_session,
          framework_version="1.15.2",
          py_version="py3",
          environment=None,
      )
      assert not tf.environment
  
file_path: sagemaker-python-sdk/tests/unit/sagemaker/tensorflow/test_estimator_init.py
imports: from __future__ import absolute_import
  from mock import Mock, patch
  from packaging import version
  import pytest
  from sagemaker.tensorflow import TensorFlow
label_desc: Use image node_id 8 for calling a global function with example usage: test_tf_miss_environment_variables(sagemaker_session) without return types